China sent up two manned spaceships and they were also great scientific in the world.
A. campaigns
B. surprises
C. achievements
D. discoveries
网友回答
A. campaigns
B. surprises
(答案→)C. achievements
D. discoveries
解析：句意：中国发射了两艘载人宇宙飞船，它们也是世界伟大的科学成就。A.战役 B.惊讶，惊喜 C.成就，成绩 D.发现 由句意可知选C。